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Finding the Fourth Proportional to 211,228.75, 316,843.13 and 70,987.38

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Solution

The fourth proportional to 211,228.75, 316,843.13 and 70,987.38 is: 106,481.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,228.75 : 316,843.13 = 70,987.38 : x
  2. Step 2: Convert to fraction form
    211,228.75/316,843.13 = 70,987.38/x
  3. Step 3: Cross multiply
    211,228.75x = 316,843.13 × 70,987.38
  4. Step 4: Simplify right side
    211,228.75x = 22,491,863,669.70
  5. Step 5: Solve for x
    x = 22,491,863,669.70/211,228.75
  6. Step 6: Final answer
    x = 106,481.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.